Climate Change Data Portal
| SGER: Glacier sensitivity to climate change: Quantifying the influence of tributary glaciers | |
| 项目编号 | 0913107 |
| Summer Rupper | |
| 项目主持机构 | Brigham Young University |
| 开始日期 | 2009-05-01 |
| 结束日期 | 2010-10-31 |
| 英文摘要 | The Gornergletscher in Switzerland is the second largest glacier system in the Alps, and it has been retreating rapidly since the turn of the century. The rate of this retreat has varied greatly, Preliminary numerical mass-balance modeling indicate that changes in tributary glaciers that feed the main valley glacier may be the key to predicting the response of system to changes in climate. Excluding these smaller, tributary glaciers from models underestimates the magnitude and response time of the glacier terminus to changes in climate. However, the model does not yet include ice dynamics. The physical and chemical properties of ice within tributary glaciers may be drastically different than those of neighboring tributaries and the main valley glacier. It thus follows that physical properties of tributary glaciers will influence the dynamics of the glacier system as a whole, influencing both the rate and magnitude of glacier responses to changes in climate. This project will investigate the influence of tributary glaciers on ice dynamics of the Gornergletscher system, and how changes in tributary glaciers then influence the response time and sensitivity of alpine glaciers to changes in climate. This will be accomplished by analyzing the chemical and physical properties of ice in several shallow (~15 m) ice cores along a traverse through the tributary and main valley glaciers. Together with ground-penetrating radar (GPR along the same transect, the ice-core data will determine the physical and chemical ice properties within tributary glaciers on the Gornergletscher, and to quantify the influence of tributary glaciers on the internal ice dynamics of the main valley glacier. The potential societal impacts of the near world-wide retreat of glaciers over the past century has been of the focus of much discussion in the scientific, economic, and political communities. Changes in these glaciers will greatly affect freshwater resources, hydroelectric power, tourism, local climate, and sea-level rise, among other things. Additionally, past climate reconstructions from records of past glacier extent often serve as the primary descriptor of the climate history of a region, and have proven critical for quantifying natural climate variability. Numerical glacier models are essential tools in studies of glacier sensitivity to climate change past, present, and future However, glacier retreat over the last century has been larger than was predicted by glacier models, challenging our understanding of glacier sensitivity to changes in climate. Given the current thinning and retreat rate of glaciers in many regions of the world, it is imperative that accurate reconstructions and predictions of glacier response to climate scenarios be provided. This project will greatly increase the knowledge of glacier sensitivity to climate change and improve the accuracy of numerical glacier models. |
| 学科分类 | 08 - 地球科学 |
| 资助机构 | US-NSF |
| 项目经费 | 34875 |
| 项目类型 | Standard Grant |
| 国家 | US |
| 语种 | 英语 |
| 文献类型 | 项目 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/72239 |
| 推荐引用方式 GB/T 7714 | Summer Rupper.SGER: Glacier sensitivity to climate change: Quantifying the influence of tributary glaciers.2009. |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| [Summer Rupper]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [Summer Rupper]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [Summer Rupper]的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
